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AURORKA [14]
3 years ago
5

What’s the mean I’m really dumb and can’t do it x

Mathematics
1 answer:
Julli [10]3 years ago
6 0

Multiply the values across the rows. So you'll multiply each mark with its corresponding frequency

6*5 = 30

7*4 = 28

8*7 = 56

9*10 = 90

10*4 = 40

Then add up those results

30+28+56+90+40 = 244

Finally, you divide by 30 since this is the total number of scores (add up everything in the second column of the original table to get 30)

So we end up with the mean being 244/30 = 8.133 approximately

Round that value however you need to.

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This is due tomorrow and i have answers but i think ive done it wrong! please help
Eva8 [605]

Answer:  i) 1 - 9x² - 12x

               ii) 17 - 3x²

             iii) - 20 + 10x² - x⁴

<u>Step-by-step explanation:</u>

g(x) = 3x + 2       h(x) = 5 - x²

i) h(g(x))

  h(3x + 2) = 5 - (3x + 2)²

                  = 5 - (9x² + 12x + 4)

                  = 5 - 9x² - 12x - 4

                  = 1 - 9x² - 12x

ii) g(h(x))

   g(5 - x²) = 3(5 - x²) + 2

                 = 15 - 3x² + 2

                 = 17 - 3x²

iii) h(h(x))

   h(5 - x²) = 5 - (5 - x²)²

                 = 5 - (25 - 10x² + x⁴)

                 = 5 - 25 + 10x² - x⁴

                 = -20 + 10x² - x⁴

4 0
3 years ago
The graph above shows the cost of renting a scooter. If Jessica drove the scooter 2 miles, how much did it cost to rent a scoote
ella [17]
A) 1.00

Just look at where the slope crosses 2 miles and then look left on the y-axis where the price is given
5 0
2 years ago
A planet has a circular orbit around a star. It is a distance of 65,000,000 km from the centre of the star. It orbits at an aver
guapka [62]

Answer:

Step-by-step explanation:

Orbit = 2*pi * r

r = 65000000 km

Orbit = 65000000 * 2 * 3.14

Orbit = 406 200 000             km

d = 406 200 000

s = speed = 65000 km / hr

t = time = d / s

t = 406,000,000 / 65000

t = 6280 hours.

1 day = 24 hours.

t = 6280 / 24 = 261.67 days

8 0
2 years ago
Can you guys help me please
aleksandrvk [35]

Answer:

Below

Step-by-step explanation:

Angle A= 65 degrees

Angle N= 53 degrees

Angle L= 45

4th image= x=30

                   2x=60

5th image= x=50

                      x+30=80

Please tell me if this helps!

6 0
2 years ago
Based on a survey, assume that 38% of consumers are comfortable having drones deliver their purchases. Suppose that we
Maslowich

Answer:

n = 4

x = 2

p = 38\%

q = 62\%

Step-by-step explanation:

Required

Find n, x, p and q

n always represent the population surveyed;

So:

n = 4

x represents the sample from the population

So:

x = 2

p always represents the given proportion

p = 38\%

Solving for q

p + q = 1

q = 1 - p

q = 1 - 38\%

q = 62\%

5 0
2 years ago
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